客运专线32m简支箱梁预应力管道摩阻损失试验研究

Experimental study on friction loss of prestressed pipe for 32 m simply supported box girder of passenger special line

通过对武广客运专线炎庙大桥32m简支箱梁6种预应力筋的管道摩阻试验,采用最小二乘法进行分析,得到预应力筋束与管道壁之间摩擦系数和管道偏差系数。试验结果表明,实测值与设计值较为接近,验证了该类型桥梁的预应力设计数据。

Through the test of friction loss of pipe with 6 kinds of prestressed reinforcement for 32m simply supported box girder of Yanmiao bridge of Wuhan- Guangzhou passenger special line, the least square method was used for the analysis, and friction coefficient between prestressed steel rope and pipe wall and pipe deviation coefficient were obtained. The test result showed that the actual measurement value is quite close to the designed value, and design data for prestress of this type of bridge were verified.